JPH075975U - Backup beam mounting structure for automobile bumpers - Google Patents

Abstract

(57) [Summary] [Purpose] The burden on the operator during the bumper installation work can be significantly reduced, and the workability that can be easily performed by one operator is improved. [Composition] With the bumper stay 2 previously attached to the vehicle body B, the upper projection formed on the backup beam 3 is locked to the sub beam 6, and the lower projection 3d is placed on the lower end edge 2c which serves as a carrying portion at the tip of the bumper stay. Then, the backup beam 3 is positioned and temporarily fixed, and in this state, the backup beam 3 is screwed and fixed to the tip portion of the bumper stay 2 to simplify the bumper mounting work and reduce the burden on the operator. Reduce and improve workability.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a backup beam mounting structure for a vehicle bumper.

[0002]

[Prior art]

 BACKGROUND ART A vehicle bumper, as disclosed in, for example, Japanese Utility Model Publication No. 4-119754, covers a synthetic resin backup beam supported by a vehicle body through a pair of bump pastes and a front portion of the backup beam. Is fixed to the bumper face, the energy absorbing material such as foam polypropylene, which is interposed between the backup beam and the bumper face, and the body or bumper stay that fixedly supports the upper part of the bumper face. It is composed of sub-beams.

As a method of attaching such a bumper to a vehicle body in an automobile production line, first, a pair of bump paste stays are fixed to the vehicle body with bolts or the like, and the bumper stays are installed horizontally and a backup beam is attached to the tip of the bump paste stay. Is installed and an energy absorbing material and a bumper face are attached to these.

[0004]

[Problems to be solved by the device]

 According to the conventional bumper described above, since the bumper stay is attached to the vehicle body and then the back up beam is attached, compared to the work of previously assembling the entire bumper and attaching the assembled bumper to the vehicle body, The weight of the mounting parts can be reduced and the burden on the operator can be reduced. However, since the backup beam has a length that extends over almost the entire width of the vehicle body, it is necessary for one operator to hold the back up beam at a predetermined position and to fix it to the bump paste by the other operator when mounting it. However, the work of holding the backup beam in place still has the drawback of imposing a heavy burden on the worker. Therefore, the object of the present invention is to significantly reduce the burden on the operator during the bumper installation work, and also to improve the workability such that it can be performed by one operator. To provide a mounting structure.

[0005]

[Means for Solving the Problems]

 The backup beam mounting structure for an automobile bumper according to the present invention that achieves the above object is composed of a pair of bump pasties attached to and supported by a vehicle body, a backup beam horizontally extending between the bump pasties and fixed to the tip of the bump pastay, and a backup beam. The bumper face is provided so as to cover the front surface of the beam, the energy absorbing material interposed between the backup beam front surface and the bumper face, and the sub-beam located along the upper surface of the backup beam. In an automobile bumper back-up beam mounting structure, the above-mentioned backup beam is mounted on an upper protrusion that is engageable with the sub-beam and that is formed on the top edge of the backup beam and a bumper stay tip end portion. Backup to perform the positioning function of the backup beam And a lower projection formed on the lower edge of the over-time, and is intended to screw secured to Banpasute over tip.

[0006]

[Action]

 With the bumper stay attached to the vehicle body in advance, the upper projection formed on the backup beam is locked to the sub-beam, and the lower projection is placed on the carrier formed on the tip of the bumper stay to position the backup beam. By temporarily fixing the backup beam and fixing the backup beam to the tip of the bumper stay in this state, the work of mounting the bumper can be simplified and the burden on the operator is reduced.

[0007]

【Example】

 An embodiment of a backup beam mounting structure for an automobile bumper according to the present invention will be described below with reference to the drawings.

FIG. 1 is a front perspective view of an automobile, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 2 is a sectional view taken along the line BB of FIG.

In the drawings, reference numeral 1 is a bumper, which is a pair of bump pasties 2 mounted and supported on the body B of the vehicle, a backup beam 3 which is horizontally attached between the bump pasties 2 and fixed to the tip of the bump pastay 2, The bumper face 4 arranged so as to cover the front surface 3e of the backup beam 3, the energy absorbing material 5 such as foamed polypropylene interposed between the backup beam 3 and the bumper face 4, and the backup beam 3 are provided. The sub-beam 6 disposed along the upper surface and extending horizontally between the bumpers stays 2 is a main component.

The bump paste 2 is fixed to the vehicle body B by bolts 7a and nuts 7b and the like, and is connected to the lower portion of the bump paste main body 2A having a U-shaped cross section and opened downward by welding or the like. The bumper bracket 2B has a U-shaped cross section that forms a closed cross section in cooperation with the bumper stay main body 2A and that opens upward.

A flange 2a for contacting and supporting the upper edge 3a of the backup beam 3 is formed at the tip of the bumper stay main body 2A. The flange 2a is welded to fix the backup beam 3 with a screw. A nut 8b is provided.

On the other hand, a flange 2b for supporting the lower end edge 3b of the backup beam 3 in contact with the lower end edge 3b of the backup beam 3 is formed at the tip of the bumper bracket 2B, and this flange 2b is a well for screwing the backup beam 3 like the bumper stay main body 2A. A ding nut (not shown) is provided. Further, as shown in FIG. 4, the bumper bracket 2B has a taper shape which becomes gradually narrower as the distance between the opposing side edges 2d moves downward as shown in FIG. When the projection 3d is placed on the lower end edge 2c serving as a carrying portion, the relative positioning of the backup beam 3 and the bump paste 2 is performed.

A sub-beam 6 which is arranged along the upper surface 3f of the backup beam 3 and supports the upper end of the bumper face 4 is mounted above the tip portion between the pair of bump paste 2 via a bracket 6a. There is.

As shown in FIGS. 2 and 3 and a perspective view of FIG. 5, the backup beam 3 has a substantially U-shaped cross section, and a central portion of the upper edge 3d thereof has a central portion of the sub-beam 6. Is provided with an upper protrusion 3c projecting upward from the vehicle body B side, and a pair of lower protrusions 3d are disposed at positions corresponding to the lower end 2c of the bumper bracket 2B constituting the bump paste 2 of the upper end 2b. Are projected horizontally. Further, the upper edge 3a and the lower edge 3b are provided with mounting holes 3g through which the bolts 8a are inserted when the backup beam 3 is screwed to the bumper stay 2.

Next, the work of mounting the bumper 1 having the above-described structure on the vehicle body B will be described.

In advance, a pair of bump paste 2 having a sub beam 6 attached to the tip end thereof via a bracket 6 a is fixed to a frame of the vehicle body B by bolts 7 a and nuts 7 b.

In the next assembling step, the upper projection 3c protruding upward from the upper edge 3a of the backup beam 3 is inserted from the lower front to the rear of the sub beam 6 as shown by a chain line 3'in FIG. The lower end of 3 is swung in the direction of the bumper stay 2 indicated by the arrow D so that the upper end edge 3a of the backup beam 3 is directed to the flange 2a formed at the tip of the bumper stay main body 2A, and the lower end edge 3b is directed to the flange 2b of the bumper bracket 2B. They are brought into contact with each other and the lower protrusion 3d is inserted into the bumper bracket 2B.

Next, when the backup beam 3 is moved downward while being in contact with the flange 2a of the bumper stay main body 2A and the flange 2b of the bumper bracket 2B, the lower protrusion 3d causes the opposite side edges of the bumper bracket 2B. The movement in the vehicle body width direction E is regulated by 2d, and the backup beam 3 is placed on the lower end edge 2c which serves as a carrying portion, and the backup beam 3 is roughly positioned.

As a result, the backup beam 3 has its vertical position determined by the lower end edge 2c of the bumper bracket 2B and its position in the vehicle body width direction E determined by the side edge 2d, and projects from the upper end edge 3a of the backup beam 3. The upper projection 3c is locked to the sub beam 6 located above the backup beam 3 to prevent tilting, and a temporary fixing state is established.

Next, the backup beam 3 in the temporarily fixed state is finely moved to align the welding nut 8b provided on the bumper stay 2 with the mounting hole 3g opened in the backup beam 3, and the bolt 8a is mounted on the mounting hole 3g. Then, the backup beam 3 is fixed to the bumper stay 2 by inserting it from above and tightening it on the welding nut 8 b.

Next, the energy material 5 is positioned on the front surface of the backup beam 3 so that the upper end is supported by the sub-beam 6 and the lower part is supported by the lower surface 3h of the backup beam 3 by a clip (not shown). The face 4 is covered and the work of attaching the bumper 1 to the vehicle body B is completed.

In the above embodiment, the case where the sub beam 6 is attached to the bumper stay 2 has been described. However, in a vehicle in which the sub beam 6 is fixed to the vehicle body B without being provided on the bumper stay 2, the backup is performed in the same manner as above. By locking the upper projection 3c of the beam 3 to this sub-beam and mounting the lower projection 3d on the lower edge 2c of the bump paste 2, the backup beam 3 is temporarily fixed and fixed to the bump paste 2 by bolts or the like. It is also possible. In addition, an insertion hole (not shown) for locking the upper projection 3c of the backup beam 3 is formed in the sub beam, and the upper projection 3c is inserted in this insertion hole so as to lock the upper portion of the backup beam 3. This is also possible.

[0023]

[Effect of device]

 According to the backup beam mounting structure for a vehicle bumper of the present invention described above, the upper protrusion that can be locked to the sub beam is mounted on the upper edge of the backup beam, and is mounted on the carrier portion formed on the bumper stay at the lower edge. Since it has a lower protrusion that fulfills the positioning function, it is possible to temporarily fix the backup beam at a predetermined position when mounting the backup beam, simplifying the mounting work and significantly reducing the burden on the operator. Moreover, it can be easily performed by one worker, and the workability is improved. In addition to the conventional simple structure of forming the upper and lower projections of the backup beam, a great effect is practically achieved. I will get it.

[Brief description of drawings]

FIG. 1 is a front perspective view of an automobile illustrating an embodiment of a backup beam mounting structure for an automobile bumper according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a perspective view schematically showing a backup beam used in this embodiment.

[Explanation of symbols]

 1 bumper 2 bumper stay 2A bumper stay body 2B bumper bracket 2c lower edge (carrying part) 3 backup beam 3a upper edge 3b lower edge 3c upper protrusion 3d lower protrusion 3e front part 4 bumper face 5 energy absorbing material 6 sub beam B vehicle body

Claims (2)

[Scope of utility model registration request] 1. A pair of bumper stays attached to and supported by a vehicle body, a backup beam extending laterally between the bumper stays and fixed to a tip of the bumper stay, and a bumper face arranged so as to cover a front portion of the backup beam. In the backup beam mounting structure of the automobile bumper, which has an energy absorbing material interposed between the front surface of the backup beam and the bumper face, and a sub-beam located along the upper surface of the backup beam, the backup beam comprises: An upper protrusion that can be locked to the sub beam and that is formed on the upper edge of the backup beam and on the lower edge of the backup beam that is placed on the carrier formed at the tip of the bumper stay to perform the backup beam positioning function And the bottom projection that is A backup beam mounting structure for automobile bumpers, which is characterized by being fastened and fixed. 2. A bumper stay has a bumper stay main body attached to a vehicle body, and a bumper bracket provided in a lower portion of the bumper stay main body and having a tip end supporting a lower end edge of the backup beam and having a substantially U-shaped cross section. The portion is formed by the lower edge of the bumper bracket.
Backup beam mounting structure for automobile bumpers.